I concur that the Ann/Bob/Carol question is more taxing than the Cognitive Reflection Test.
In fact I can prove for my own case sample size N = 1. I scored 3⁄3 on the CRT and I missed Ann/Bob/Carol as I did not look at Bob as being unambiguously either married or unmarried and shot myself in my own damn foot on the sucker.
I concur that the Ann/Bob/Carol question is more taxing than the Cognitive Reflection Test.
In fact I can prove for my own case sample size N = 1. I scored 3⁄3 on the CRT and I missed Ann/Bob/Carol as I did not look at Bob as being unambiguously either married or unmarried and shot myself in my own damn foot on the sucker.